One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10)(11,16)(12,14)(13,15)(17,18,21,24)(19,20,23,22)(25,26)(27,30)(28,29)(31,32)(1,2,4,5)(3,6,7,8)(9,11)(10,13)(12,16)(14,15)(17,19,21,23)(18,22,24,20)(26,29)(27,31)(3,7)(6,8)(10,12)(11,15)(19,23)(20,22)(25,26,28,29)(27,30,31,32)(1,3)(2,6)(4,7)(5,8)(9,12,14,10)(11,13,15,16)(17,20,21,22)(18,23,24,19)(25,26)(27,32)(28,29)(30,31)(1,2)(3,8)(4,5)(6,7)(9,13)(10,15)(11,12)(14,16)(17,18)(19,20)(21,24)(22,23)(25,27,28,31)(26,30,29,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.